Author Topic: PIPES AND CISTERNS (capacity of cistern)  (Read 4271 times)

Mohd Liyaqat Hussain

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PIPES AND CISTERNS (capacity of cistern)
« on: February 10, 2014, 10:04:34 AM »
 :) daniel bro...
again you have to solve a problem for me :)
Q) Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute.All the three pipes working together can fill the tank in 15 minutes.the capacity of the tank is..........

a)60 gallons
b)100 gallons
c)120 gallons
d)180 gallons
Thanks in advance :)

Bibhudas

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Re: PIPES AND CISTERNS (capacity of cistern)
« Reply #1 on: February 21, 2014, 11:11:33 AM »
Hi , I would like to try it
as u know in 1 minute  pipe A and B can fill 1/20 and 1/24 respectively,and pipe C can empty 1/x  ,in the question it's also given that all the three working at a time can fill the tank in 15 minutes.
We can frame an equation 1/20 +1/24 -1/x=1/15 ,after solving it we get x=40  8) 

pipe C can empty the tank at a rate of 3 gallons per minute so capacity of the tank is 40*3=120 gallons.

Thanks
It's all over to Daniel  :-X

aptiadmin

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Re: PIPES AND CISTERNS (capacity of cistern)
« Reply #2 on: February 22, 2014, 09:50:29 PM »
Hello Guys :)  Bibhu you posted the right answer buddy :)   8) great job! :) i hope Mohd's doubt is cleared now :)
The more questions we discuss the more we can learn :)
Math is Beautiful :) Its like poetry :)
If Math doesn't give you your expected answer, then don't Blame Math.
Math is NEVER wrong :) You are ;)